<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <!-- 
        按键修饰符   @事件名.enter
            @keyup.enter   -> 键盘回车监听
    -->
    <div id="app">
        <h3>@keyup.enter → 监听键盘回车事件</h3>
        <input @keyup.enter="fn" v-model="username" type="text">
    </div>
    <script src="./script/vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                username: ''
            },
            methods: {
                fn(e) {
                    // if (e.key === 'Enter') {
                    //   console.log('键盘回车的时候触发', this.username)
                    // }
                    console.log('键盘回车的时候触发', this.username)
                }
            }
        })
    </script>
</body>

</html>